AUTHOR=Li Dan-Yang , Xiong Xian-Zhi TITLE=Corrigendum: ICOS+ Tregs: A Functional Subset of Tregs in Immune Diseases JOURNAL=Frontiers in Immunology VOLUME=12 YEAR=2021 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2021.701515 DOI=10.3389/fimmu.2021.701515 ISSN=1664-3224